PT7C4337 Datasheet, PDF (6/25 Pages) List of Unclassifed Manufacturers – Real-time Clock Module (I2C Bus)

Data Sheet
PT7C4337
Real-time Clock Module (I²C Bus)
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Registers
Allocation of registers
Addr.
(hex)^*1
Function
Register definition
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
00 Seconds (00-59)
0
S40
S20
S10
S8
S4
01 Minutes (00-59)
0
M40
M20
M10
M8
M4
02 Hours (00-23 / 01-12)
H20 or
0
12, /24
H10
H8
H4
P, /A
03 Days of the week (01-07)
0
0
0
0
0
W4
Bit 1
S2
M2
H2
W2
Bit 0
S1
M1
H1
W1
04 Dates (01-31)
0
0
D20
D10
D8
D4
D2
D1
05 Months (01-12)
Century
0
0
MO10 MO8
MO4
MO2
MO1
06 Years (00-99)
Y80
Y40
Y20
Y10
Y8
Y4
Y2
Y1
07 Alarm 1: Seconds
A1M1^*2
S40
S20
S10
S8
S4
S2
S1
08 Alarm 1: Minutes
09 Alarm 1: Hours
0A Alarm 1: Day, Date
0B Alarm 2: Minutes
0C Alarm 2: Hours
0D Alarm 2: Day, Date
0E Control
A1M2^*2 M40
A1M3^*2
A1M4^*2
A2M2^*3
12, /24
Day,
/Date
M40
A2M3^*3 12, /24
A2M4^*3
/ETIME^*4
Day,
/Date
0
M20
H20 or
P, /A
0,
D20
M20
H20 or
P, /A
0,
D20
0
M10
H10
0,
D10
M10
H10
0,
D10
RS2^*5
M8
M4
M2
M1
H8
H4
H2
H1
0,
W4,
W2,
W1,
D8
D4
D2
D1
M8
M4
M2
M1
H8
0,
D8
RS1^*5
H4
H2
W4,
W2,
D4
D2
INTCN^*6 A2IE^*7
H1
W1,
D1
A1IE^*7
0F Status
OSF^*9
0
0
0
0
0
A2F^*8
Caution points:
*1. PT7C4337 uses 8 bits for address. For excess 0FH address, PT7C4337 will not respond (no acknowledge signal was given).
*2. Alarm 1 mask bits. Select alarm repeated rate when an alarm occurs.
*3. Alarm 2 mask bits. Select alarm repeated rate when an alarm occurs.
*4. Oscillator and time count chain enable/disable bit.
*5. Square wave output frequency select.
*6. Interrupt output pin select bit.
*7. Alarm 1 and alarm 2 enable bits.
*8. Alarm 1 and alarm 2 flag bits.
*9. Oscillator stop flag.
*10. All bits marked with "0" are read-only bits. Their value when read is always "0".
A1F^*8
PT0205(02/07)
6
Ver: 1